Valve assembly

Abstract

A valve assembly is disclosed. The valve assembly is installed between an inlet pipe and an outlet pipe through which a fluid is transferred, the valve assembly including: a valve body in which an inlet portion which is connected to the inlet pipe and through which the fluid is introduced, a space portion in which the fluid supplied to an inside of the valve body through the inlet portion stays, and an outlet portion which is connected to the outlet pipe and through which the fluid of the space portion is discharged to the outside are formed; and an opening and closing unit configured to open or close a path of the fluid by moving in a state of being in close contact with an inner surface of the valve body, wherein the valve body is formed of a pipe of a steel or stainless-steel material.

The invention claimed is: 
     
       1. A valve assembly installed between an inlet pipe and an outlet pipe through which a fluid is transferred, the valve assembly comprising:
 a valve body in which an inlet portion, a space portion, and an outlet portion are formed, wherein the inlet portion is connected to the inlet pipe and the fluid is introduced through the inlet portion, the fluid supplied to an inside of the valve body through the inlet portion stays in the space portion, and the outlet portion is connected to the outlet pipe and the fluid of the space portion is discharged to the outside through the outlet portion; and 
 an opening and closing unit configured to open or close a path of the fluid by moving in a state of being in close contact with an inner surface of the valve body, 
 wherein the valve body is formed of a pipe of a steel or stainless-steel material, 
 wherein the valve body is formed with an entrance portion in which the opening and closing unit is installed, 
 wherein the valve body includes the inlet portion formed at one side thereof, the entrance portion formed at the other side thereof, and the space portion formed between the inlet portion and the entrance portion, and the inlet portion, the space portion, and the entrance portion are disposed in a straight line, 
 wherein the opening and closing unit includes: 
 a stem passing through a shielding member installed at the entrance portion; 
 a disk installed in the stem and slidably moving along a longitudinal direction of the stem in a state in which an outer circumferential surface thereof is in close contact with an inner circumferential surface of the inlet portion or the space portion; 
 a first and second stoppers formed to protrude along the outer circumferential surface of the stem to restrict the slide movement of the disk; and 
 a handle moving the stem to move the positions of the first and second stoppers, 
 wherein the stem is arranged in a straight line of the inlet portion, the space portion and the entrance portion, 
 wherein diameters of the inlet portion and the space portion are the same in a movement section of the disk, 
 wherein the disc is placed in close contact with the inner circumferential surface of the inlet portion to close the path of the fluid, 
 wherein the first stopper is formed at one side end portion of the stem, and 
 wherein the second stopper is formed between the disk and the shielding member. 
 
     
     
       2. The valve assembly of  claim 1 , wherein at least one of the inlet pipe, the valve body, and the outlet pipe is formed by cutting a steel pipe or a stainless-steel pipe. 
     
     
       3. The valve assembly of  claim 1 , wherein at least one of the inlet pipe, the valve body, the outlet pipe is formed by rolling a steel plate or a stainless-steel plate into a cylindrical shape and welding a joint thereof. 
     
     
       4. The valve assembly of  claim 1 , wherein: groove portions are respectively formed at end portions of the valve body, in which the inlet portion and the outlet portion are formed and one side end portions of the inlet pipe and the outlet pipe, and are recessed inward along circumferences of the end portions and the one side end portions; and the valve body is connected to the inlet pipe and the outlet pipe using a joint ring fastened with bolts. 
     
     
       5. The valve assembly of  claim 4 , wherein a gasket for sealing is formed between the groove portions, which are formed in the valve body, the inlet pipe, and the outlet pipe. 
     
     
       6. The valve assembly of  claim 1 , wherein: protrusion portions are respectively formed at end portions of the valve body, in which the inlet portion and the outlet portion are formed and one side end portions of the inlet pipe and the outlet pipe, and protrude outward along circumferences of the end portions and the one side end portions; and the valve body is connected to the inlet pipe and the outlet pipe using a joint ring fastened with bolts. 
     
     
       7. The valve assembly of  claim 6 , wherein a gasket for sealing is formed between the protrusion portions, which are formed in the valve body, the inlet pipe, and the outlet pipe. 
     
     
       8. The valve assembly of  claim 1 , wherein each end portion of the valve body, in which the inlet portion and the outlet portion are formed, is connected to the inlet pipe and the outlet pipe by welding. 
     
     
       9. The valve assembly of  claim 1 , wherein flanges are respectively formed at end portions of the valve body, in which the inlet portion and the outlet portion are formed, and the inlet pipe and the outlet pipe, and the valve body and the inlet and outlet pipes are connected to each other by fastening the flanges using bolts.